Tool for removing locking keys from brake anchor bolts



Aug. 9, 1949. f c. B. WAYRYNEN TOOL FOR REMOVING LOCKING KEYS FROM BRAKEANCHOR BOLTS Filed April 8, 1947 IN VEN TOR. CA RL 5. Mmy/vz/v ATTORNEY.f

Patented Aug. 9, 1949 ii odt FR nests-sat stint, f ""lfil'sim; (01.2mm

This invention relates to atool for removing locking keys nan kei'inchor bolts of auto- Imotive vehicles makes of automobiles, trucks,and bosses the brake shoes are mounted on eccentric anchor bolts whichcan be rotated to adjust tl'iebaiid clearance. The shoes are held inplace on the bolts by means of flat, U-shaped keys which are Lforcedinto circumferential grooves in the bolts It "is exceedingly i v tliesekeys, sincetheyare; it v'ely thin aird 'm c'l se to the Hi a-lie"asse"bly that they cannot be reached or gripped by conventional tools.They often become bent and distorted so that it is impossible to removethem with ordinary tools without completely demolishing the key.

The principal object of this invention is to provide an improved toolfor removing and replacing these keys which will be economical tomanufacture, simple in operation, and which will instantly remove anykey, regardless of its condition, without damage to either the key orthe bolt.

Qther objects and advantages reside in the detail construction of theinvention, which is designed for simplicity, economy, and efficiency.These will become more apparent from the following description.

In the following detailed description of the invention, reference is hadto the accompanying drawing which forms a part hereof. Like numeralsrefer to like parts in all views of the drawing and throughout thedescription.

In the drawing:

Fig. 1 is an end view of a conventional brake anchor bolt, with itslocking key in place thereon;

Fig. 2 is a. side view of the head portion of the bolt and locking keyof Fig. 1;

Fig. 3 is a side elevational view of the improved tool illustrating, inbroken line, its operating position relative to the bolt and key of Fig.2;

Fig. 4 is a top plan view of the improved tool; and

Fig. 5 is an end view of the tool in place on an anchor bolt, the boltbeing shown in crosssection as though out on the line 55, Fig. 3.

While the invention will be found useful on any bolt having a thin,U-shaped locking key, it is more particularly designed for use onautomotive brake anchor bolts. Such -a bolt is illustrated at II] on thedrawing, with its U-shaped, sheet metal, locking key at II. The keyslips astride a circumferential receiving groove I2 formed about thehead of the bolt I I) and having wayrynen, Denver, Colo. v

II. The opening between the two ofthe ees; I'I is eghty tests; or" hedittii'iigter of 'tlfe grodvevasaaasatieiwrfeh r? nits-tire gr c 'emeieg iibrtiegis tin -5t P69 admit the b'c'iltiarid-sriazp aetiittiiiatgei tb aegis the in" iece; riie I I relatively horizontally at itsmiddle portion, and wareiyat-its tgittanl t'tranh naifrbwsatfitreisfihon his sto ies iifirtioffs. "rt rena/a the has been heretofore necessaryto pry or poun it mom'piate.

The improved tool comprises two handle members, which will herein bedesignated for convenience an upper handle member I3 and a lower handlemember I4.

The two handle members I3 and I4 are preferably rounded adjacent theirextremities to provide a comfortable hand grip, and are verticallyflattened adjacent their forward extremities to lie flat against eachother about a hinge bolt I5 in plier-like arrangement.

The lower handle member I 4 terminates in a transversely widened,downwardly curved, hooked upper jaw I B in the bottom edge of which anupwardly curved arcuate notch I1 is formed. The radius of the notch I'lcorresponds to the radius of the head of the .bolt III.

The upper handle member I4 terminates in a relatively wide, flat,horizontal lower jaw I8 which projects forwardly of the hooked upper jawa distance substantially equal to the thickness of the key I I. Arearwardly extending notch I9 is formed in the forward extremity of thelower jaw I8. The width of the notch I9 is less than the width of thekey I I but greater than the width of the head of the bolt Ill. Thewidth of the upper jaw I6 is slightly less than the width of the notchI9 so that the former may pass downwardly into the latter.

Let us assume that the key II is in place on the bolt I0 and that it isdesired to remove it with the improved tool. The jaws I6 and I8 areseparated and the upper jaw I6 is rested upon the head of the bolt III,with the notch I'I receiving the head, in close proximity to the key II.

The handles I3 and I4 are now squeezed together. This brings the lowerjaw I8 upwardly until the two sides of the notch I9 engage the twobulging sides of the key I I, as shown in Fig. 5. Further pressure onthe handles forces the lower jaw and the key I I upwardly and the upperjaw and the bolt I0 downwardly, resulting in snap ping the key from itsgroove I2. The edges of the notch I9 bite into the sides of the key I Iwith a width corresponding to the thickness of the key such force thatthe key wedges therein and remains self-supporting in the notch after ithas been removed from the bolt I0. Sufiicient force can be exerted onthe key to force it from the slot, regardless of its condition. If theextremities of the legs of the key are bent, they will straighten out asthey are forced upwardly through the groove l2.

To replace the key with the tool, it is only necessary to reverse thetoolsro that the side edges of the slot I9 will engage the top of thekey to force the leg portions thereof downwardly on each side of thebolt head.

In the description and claim of this invention, the handles and lawshave been referred to as upper and lower, and the movements have beenreferred to as upward and downward. It is to be understood that theseare simply terms of convenience, with reference to the particularshowing on the drawing. The tool will operate efiiciently in any desiredposition and in any desired direction.

While a specific form of the improvement has been described andillustrated herein, it is desired to be understood that the same may bevaried, within the scope of the appended claim,

without departing from the spirit of the invention.

Having thus described the invention, what is claimed and desired securedby Letters Patent i A tool for removing locking keys from brake anchorbolts comprising: a relatively wide, flat lower jaw; an upper handlemember secured to and extending upwardly and rearwardly from the middleof the rear upper surface of said lower jaw; a medially located notchextending rearward from the forward edge of said lower jaw a hookedupper jaw; a relatively wide lower edge on said upper jaw positionedover and extending transversally of said notch and having less widththan the latter; a lower handle member extending rearwardly anddownwardly from said hooked upper jaw across said upper handle member;pivot means securing said handle members together at their intersection;and an upwardly curved arcuate notch formed in the said relatively widelower edge of said hooked upper jaw, the axis of said arcuate notchlying in the vertical medial plane of the notch in said lower Jaw.

CARL B. WAYRYNEN.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS

